-------------------------------------------------------------------------
Debian LTS Advisory DLA-3232-1                debian-lts@lists.debian.org
https://www.debian.org/lts/security/                         Tobias Frost
December 07, 2022                             https://wiki.debian.org/LTS
-------------------------------------------------------------------------

Package        : virglrenderer
Version        : 0.7.0-2+deb10u1
CVE ID         : CVE-2019-18388 CVE-2019-18389 CVE-2019-18390 CVE-2019-18391
                 CVE-2020-8002 CVE-2020-8003 CVE-2022-0135
Debian Bug     : 946942 949954 1009073

Several security vulnerabilities were discovered in virglrenderer, a virtual
GPU for KVM virtualization.

CVE-2019-18388

    A NULL pointer dereference in vrend_renderer.c in virglrenderer through
    0.8.0 allows guest OS users to cause a denial of service via malformed
    commands.

CVE-2019-18389

    A heap-based buffer overflow in the vrend_renderer_transfer_write_iov
    function in vrend_renderer.c in virglrenderer through 0.8.0 allows
    guest OS users to cause a denial of service, or QEMU guest-to-host
    escape and code execution, via VIRGL_CCMD_RESOURCE_INLINE_WRITE
    commands.

CVE-2019-18390

    An out-of-bounds read in the vrend_blit_need_swizzle function in
    vrend_renderer.c in virglrenderer through 0.8.0 allows guest OS
    users to cause a denial of service via VIRGL_CCMD_BLIT commands.

CVE-2019-18391

    A heap-based buffer overflow in the vrend_renderer_transfer_write_iov
    function in vrend_renderer.c in virglrenderer through 0.8.0 allows
    guest OS users to cause a denial of service via
    VIRGL_CCMD_RESOURCE_INLINE_WRITE commands.

CVE-2020-8002

    A NULL pointer dereference in vrend_renderer.c in virglrenderer through
    0.8.1 allows attackers to cause a denial of service via commands that attempt
    to launch a grid without previously providing a Compute Shader (CS).

CVE-2020-8003

    A double-free vulnerability in vrend_renderer.c in virglrenderer through
    0.8.1 allows attackers to cause a denial of service by triggering texture
    allocation failure, because vrend_renderer_resource_allocated_texture is not an
    appropriate place for a free.

CVE-2022-0135

    An out-of-bounds write issue was found in the VirGL virtual OpenGL renderer
    (virglrenderer). This flaw allows a malicious guest to create a specially
    crafted virgil resource and then issue a VIRTGPU_EXECBUFFER ioctl, leading to a
    denial of service or possible code execution.

For Debian 10 buster, these problems have been fixed in version
0.7.0-2+deb10u1.

We recommend that you upgrade your virglrenderer packages.

For the detailed security status of virglrenderer please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/virglrenderer

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS